Detector channel gain calibration using focal spot wobble

Details Detector channel gain calibration using focal spot wobble Detector channel gain calibration using focal spot wobble

1994-04-11

1995-07-04

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378207, G01T 129

Patent

active

054307856

ABSTRACT:
A 3rd generation CT system produces gain calibration factors (.gamma.) for each channel of a detector array while a scan is being performed. Redundant views are acquired during the scan but the x-ray intensity values in the second view are shifted to the adjacent detector channel by focal spot wobbling the x-ray source. Gain calibration factors (.gamma.) are calculated using the ratio (.beta.) of x-ray intensity values measured at adjacent detector channels.

REFERENCES:
patent: 4789930 (1988-12-01), Sones et al.

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